Centrifugal separator.



No. 720,810. PATENTED 313.17, 190s. J. P. HULTGREN.

OENTRIFUGAL SEPARATOR.

APPLIUATION FILED JAN. 13, 1902.

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UNITED STATES PATENT OFFICE.

J OHAN PETER I-IULTGREN, OF STOOKHOLM, SW'EDEN, ASSIGNOR OF ONE- HALF TO FILIP HENRIK GETZMAN, OF STOOKHOLM, SWEDEN.

CENTRIFUGAL SEPARATOR.

SPEGIFIGATION forming part of Letters Patent No. 720,810, dated. February 17, 1903. Application filed January 13, 1902. Serial No. 89,426, (No model.)

To aZZ whom it may concern:

Be it known that I, JOHAN PETER HULT GREN, a subject of the King of Sweden and Norway, and a resident of Stockholm,Sweden, have invented a new and useful Improvement in Centrifugal Separators, of which the following is a specification, reference being had to the drawings accompanying and forming a part hereof.

This invention relates to improvements in centrifugal separators.

The invention consists, briefly, in combining with the separator-drum of liners of elliptical horizontal cross-section provided with wedge-shaped projections with their points turned downward and in providing the outlet-openings of said projections in their lower parts. The invention also consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention is illustrated in the accompanying drawings.

Figures 1 and 2 show vertical cross-sections at right angles to each other of a centrifugalseparator drum with a liner constructed in accordance with the present invention. Fig. 3 illustrates in side View another form of a liner according to the present invention; and Fig. 4 represents sections superposed on one another on lines A A, B B, and C O in Fig. 3.

In a centrifugal-separator drum A of any well-known construction is provided a liner B, preferably conical and of elliptical horizontal cross-section. On said liner B are provided projections l, the said projections being wedge-shaped and arranged with their points turned downward and provided with openings 2 at their lower ends. The cream particles passing out through the said openings 2 will on account of the centrifugal force immediately make their way into the folds formed by the sides of the projections and the liner-wall and rise in said folds up to creamoutlet 3, Fig. 1, whereas the blue milk is forced outward. If the liner B, as shown in the drawings, is made of such form that the horizontal cross-section will be elliptical, said projections should be arranged in two opposite rows arranged at the parts of the ellipse having the largest axis.

It is obvious that in liners having projections of the shape just described the cream on the outside of the mantle will flow to the side in such way that it cannot be mixed with the milk passing out through higher-situated openings 2.

By twisting the elliptical liners, as shown in Figs. 3 and 4, so that the rows of projections form screw-lines the path of the cream will be lengthened, and consequently the blue milk that may still adhere to the cream will have time to separate from the same, so that a more efiectual separation results.

Having now described my invention, what I claim, and desire to secure by United States Letters Patent, is-

1. The combination with a separating-bowl having discharges for the separated cream and skim-milk, and a supply device for the full milk, of hollow conical liners of elliptical horizontal cross-section extending diagonally through the liquid-space of the bowl, and provided with wedge-shaped projections having their points turned downward and provided with openings at their lower ends, substantially as and for the purpose set forth.

'2. The combination with a separating-bowl having discharges for the separated cream and skim-milk, and a supply device for the full milk, of hollow, twisted liners of elliptical cross-section extending diagonally through the liquid-space of the bowl, and angle-shaped projections having their points turned downward on said liners, and provided with openings at their lower ends, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHAN PETER HULTGREN.

Witnesses:

JOHN DELMAB, KARL JoHANsoN. 

